如何使用REST using Post方法在android中获取XML信息？

Question

例如，

URI: http://99.99.99.99:8080/services/api/products/getProduct

Method: POST

Content-Type: application/xml

然后，我用Advanced Rest Client可以得到这些数据

<Products>
  <Product>
    <category>Apple</category>
    <productCode>A1</productCode>
  </Product>
  <Product>
    <category>Orange</category>
    <productCode>A2</productCode>
  </Product>
  <Product>
    <category>Banana</category>
    <productCode>A3</productCode>
  </Product>
....
</Products>

如果我想存储所有类别和产品代码怎么办。

我应该使用什么样的方法？

HttpPost？ XML 解析器？

这是我尝试的示例代码，但我从 logcat.

中一无所获

public void getXml(){    

            String result = "";

            HttpClient client = new DefaultHttpClient();

            try {

                HttpPost post = new HttpPost("http://99.99.99.99:8080/services/api/products/getProduct");

                HttpResponse responsePOST = client.execute(post); 

                HttpEntity resEntity = responsePOST.getEntity();

                if (resEntity != null) {    
                    result = EntityUtils.toString(resEntity);
                }

            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                client.getConnectionManager().shutdown();
            }

             System.out.println(result);
        }

Answer 1

我认为 System.out.println 的输出在 logcat 中不可见。

您应该使用 Log class 代替：

Log.d("test", result);

此外，您必须确保您的请求是 done in a separate thread。

Answer 2

我遇到了你的问题，主要是你在主线程中调用了 api，

但是你必须在后台线程中调用这个 api

使用 AsynTask

    public class GetDetails extends AsyncTask<String, Void, String>{

    String response = null;
    @Override
    protected String doInBackground(String... strings) {
        try {

    HttpParams httpParameters = new BasicHttpParams();
    int timeoutConnection = 3000;
    HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
    // Set the default socket timeout (SO_TIMEOUT) 
    // in milliseconds which is the timeout for waiting for data.
    int timeoutSocket = 5000;
    HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
    DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
    HttpPost httppost = null;

    httppost = new HttpPost("http://99.99.99.99:8080/services/api/products/getProduct");

    httppost.setHeader("Accept", "application/xml");
    httppost.setHeader("Content-type", "application/xml");

    HttpResponse httpResponse = httpClient.execute(httppost);

    InputStream inputStream = httpResponse.getEntity().getContent();
    if (inputStream != null)
         response = convertInputStreamToString(inputStream);
    else
        response = null;

    Log.v("data for list", response);

        } catch (Exception e) {
            Log.e("Cann", e.toString());
        }

        return strings[0];
    }

    @Override
    protected void onPostExecute(String result) {
    super.onPostExecute(result);
           if(response != null){
           XmlPullParserFactory factory =XmlPullParserFactory.newInstance();
             factory.setNamespaceAware(true);
             XmlPullParser xpp = factory.newPullParser();

             xpp.setInput(new StringReader (result));
             int eventType = xpp.getEventType();
             while (eventType != XmlPullParser.END_DOCUMENT) {
              if(eventType == XmlPullParser.START_DOCUMENT) {
                  System.out.println("Start document");
              } else if(eventType == XmlPullParser.END_DOCUMENT) {
                  System.out.println("End document");
              } else if(eventType == XmlPullParser.START_TAG) {
                  System.out.println("Start tag "+xpp.getName());
              } else if(eventType == XmlPullParser.END_TAG) {
                  System.out.println("End tag "+xpp.getName());
              } else if(eventType == XmlPullParser.TEXT) {
             System.out.println("End tag "+xpp.getName());       
              }
              eventType = xpp.next();
             }
         }
      }

private String convertInputStreamToString(InputStream inputStream)
        throws IOException {
    BufferedReader bufferedReader = new BufferedReader(
            new InputStreamReader(inputStream));
    String line = "";
    String result = "";
    while ((line = bufferedReader.readLine()) != null)
        result += line;

    inputStream.close();
    return result;

}   

}

最后调用 getXml() 方法的地方更改为 new GetDetails().execute("")

如何使用REST using Post方法在android中获取XML信息？

How to use REST using Post Method to get XML information in android?

rest

android

httpclient

xml-parsing